Question

how does water help in keeping the temperature in cold countries warm

Answer 1

Water has the highest Specific heat capacity.
So it has the ability to retain heat for a longer time.
So For a decrease in temperature water does not lose its heat.
So water is used in cold countries to keep the temperature warm.

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Answer 2

Explanation:

water has the highest specific heat capacity. so it is the ability to retain heat for a longer time. so for a decrease in the temperature water does not lose it heat. so,water is used in cold countries to keep the temperature warm